Cut-off mechanism



Oct. 21 1924. Y

L. K. DAWSV CUT-OFF' MECHANISM NN, m

Filed Bay 1G, i921 2 ShetS-She. 1

-Nimm Oct. 21 1924-.

L.. K. DAVIS CUT-OFF MECHANISM l 2 Sheets-Sheet Original Filed May 16.

me @a 21,1924. 1,512,292 UNITED STATES PATENT cerros.

LEWIS x. DVIS, DE WASHINGTON, DISTRICT 0F JOLUMBIA. ASSIGNOR TO VAUGHN CAMP, OF NORFOLK, VIRGINI GUT-OFF MECHANISM.

ldlc( for abandoned application Serial No. 470,058, led may 16. 1921. This application led March 17, 1923, Serial No. 625,889.

To all whom it may oo'ncem: machine having feet 2 upon which it rests. 65 Be it known that I, LEWIS K. DAVIS, a As shown in Fig. 2 there is mounted upon citizen ofY the United States, residing at one .end of the frame 2, a cylinder or roller WashingtonI District of Columbia, have in- 3 over which the fabric 4 travels es it comes I vented certain new and useful Improvements from the forward part of the machine (not in Cut-Off Mechanism, of which the followshown) und passs overl a guide roller 5 60 ing is a specification. mounted in a support 6 of the frame 1.

is invelition relates to certain new and The numeral 8 refers to shaft, receiving useful improvements in cut-off mechanism power from any suitable source, and having l and'it has particular relation to a. device` a bushing S), This'siiaft extends transversely designedfor the purpose of cutting into cerof the machine is mounted in bearings G tain lengths the finished product which l1 and 11', upcn uprights i2. Mounted asses through a fabricating machine, such, near each end of said shaft and adiacentl the ior instance` as that shown in my co-pending edge of the frame ofthe machine are grooved application led on the 17th day of May, eccentrics 13 and 13 and on the farther 1921, Serial No. 470,470. This application is side of the frame and beyond the hearing 11 70 tiled in place of my abandoned application 1s a sprocket wheel 151 The split collars 16 470,058, tiled May 16,1921. and 16 are contained in the grooved ec- The device shown in my copending applicentrics i3 and 13, one side of said split cation gives satisfactory rults and is collars comprisingthe bifurcated-extensions adapted to travel upon a carriage which 17 of the blade supportiiiig bar or member 75 goes back and forth synchronously with the 17. The forward end of this barvturns abric to-avoid any buckling of the latter downwardly and adjustably secured to its when the knife descends in the act cutting. endl by means of bolts 18, is a cutting blade In the resent inventionI secure the back- 19 extending transversely of the machine.

ward an forward movement and also the The eccentrics mounted as above set forth vertical movement-of the blade by a simimpart reciprocating motion to the bar 17 plied mechanism quite different from that and this movement is timed so Ias to co-opshown in theapplioation above referred to, crate synchronously with the movement of 30 and with very satisfactory results. the fabric 4, supported upo'n a moving table With these and other objects in view which 20. so that when the blade descends in the 85 may be incident to my improvements, the act of cutting any buckling of said fabric is invention consists in the parts and combinaentirely prevented. tions to be hereinafter set forth and clai-med,' Upon each side of the machine are standwith the understanding that the several elearde 20 having bearings 21 thereon, in

ments comprising my invention, may be which is mounted a shaft 22, having near 90 varied in construction, proportions and arone end a gear 21. On the outer end of said rangement, 'without departing from the shaft is a sprocket wheel 22 and clutch spirit and scope of the appended claims. members 23. The outer end of the shaft S is 4U In order to makefmy invention more also provided with a pulley 15 and the two 'clearly understood, I have shownV in the sprocket wheels are connected by a s rocket 95 `accompanying drawings means for carrying `chain 23 whereby motion is imparte to the the same into practical effect', without limitgear 21 and to the cam 24 to be presently in'g the improvements in their useful a plireferred to.

45 cations to the particular constructions, w ich The reciprocating bar 17 is of considerfor the pur ose of explanation, have been able weight, and on each side 1s provided an 100 made the su ject of illustration. upstanding arm ormember 25 having at its In the drawings: lower end a roller 26 to travel upon the outer Figure '1 is a plan view of my device surface of the cams 24, one on each side of showing the fabric passing through the the machine mounted upon the shaft 22.

machine. By this arrangement while the eccentrica 13 105 `Fig. 2 is a vertical sectional view of the andli give to the bar 17 a reciprocating same.` motion, the cams cause said bar to move ver The numeral 1 refers to the frame of the tically; downwardly to cut the fabric and lil then immediately upwardly again to what maybe termed its normal position above the traveling fabric 4.

Located below the shaft 22 and e'Xtending transversely of tle machine is another shaft 27 mounted in bearings 29 upon the standards 20. Acsgear 28 isy ,keyedfon the shaft 27 and is in meshiwith and rotated by the gear 2l'. Said shaft 27 also operates eccentrics 30, one locatedn each side of the machine and having a circumferential groove 30 in which the split collars 31 upon the ends of the eccentrics rods are secured. The other ends of said eccentrics rods areI attached by bolts 3340 the bifurcated ends of side bars or ears 33 attached to opposite sides of the movable table 34.

As clearly seen in Fig. 2, this `table is provided with sleeves 34', attached thereto'or formed integrally therewith and adapted to embrace and travel over horizontal guide rods 35 mounted in supports 6 and 36 of the main frame.

v The movabletable 34 is slotted as seen at 37, and as the blade descends through the fabric it descends into sadslotz The movement of the blade and the table 34 are c0- ordinated so as to be synchronous and enable the cutting of the fabric to be done while the table moves and thus any buckling of the fabric is avoided.

It is to be noted that by providing several cams 24 each similar to, but varying in size from the other, the operator will be enabled by a change of the cam to cut the fabric into different predetermined lengths. The rollers 38 carried by the frame members 36 and 39 are for the purpose of supporting the fabric as it progresses'thi'ough the machine. 1

While I have shown and described the preferred embodiment of my invention, I wish it to be understood that I do not confine myself to the precise details of construction herein set forth, by -way of illustration, as it is apparent that many modifications and variations may be made therein, by those skilled in the art, Without departing from the spirit of the invention, or exceeding the scope of the appended claims.

I claim as my invention:

1. In a device of the character described, the combination with a base, of amovable table thereon over which a fabric is adapted to travel, a blade, a supporting bar on which the blade is mounted, a c am to actuate said bar vertically, said cam being Vindependent of said means to admit adjustment of intervals of operation, Whereb the fabric may be cut into predetermine lengths without any buckling thereof,. and means to reciprocate said bar synchronously with the fabric.

2. In a. device of the character described, the combination with a base. a movable table and supporting rollers mounted on the base ver ywhich the fabric is aaaped a cava, a pi'votall mounted blade supporting bar and 'a bla'de ihounted on one end thereo adapted ,'to Inove synchronously with the fabric, of

cans to impart reciprocating motion to said blar and means intermediate the ends of the blade supporting bar to impart at the same time a vertical movement thereto whereby thel fabric may be cut into predetermined lengths without an buckling thereof.

3. In a device o the character described, the combination with a base, a movable table and supporting rollers mounted on the base over which the fabric is adapted to travel, a blade supporting bar and a blade mounted upon one end thereof adapted to move synchronously with the fabric, and an arm projecting from said bar, of means at the other end of said bar to impart reciprocating mo tion thereto, a cam below the projecting arm with which said arm engages whereb a vertical .movement is imparted to the bar synchronously with the reciprocating movement whereb the fabric may be cut into predetermine lengths without any buckling thereof. i f

4. Ina device of the character d, the combination with a base, a movable table and supporting rollers mounted thereon, over which' the fabric is adapted to progress, a blade supporting bar one end of which is provided with a cutting ed and the other end of which is connected t h intermediate means with a power shaft y which it is given a reciprocating motion, of a projecting arm intermediate its ends, a cam with which said arm engages to impart vertical movement to the lade synchronously with its r /iprocating movement whereby the fabric may be cut into predetermined lengths wiithoutian buckling thereof.

5. In ai evice, o the character described, the com nation with a base, su porting rollers mounted thereon, over w ch the fabric is adapted to travel, a detachable cutting blade mounted upon the downwardly curved end of a reciprocating bar, and an arm projecting therefrom between the ends of said bar, of means at the other end of the bar, to impart reciprocating motion thereto, a cam below the projecting arm with which said arm engages to impart a vertical move- 'ment to the blade synchronously with its reciprocating movement whereby the fabric may be cut into predetermined lengths with- Y out any buckling thereof.

6. In a device of the character described, the combination with a base, a movable table mounted thereon over which fabric is adapt; ed to travel, of a cutting blade adapted to move synchronously with the table and fabric and means to actuate the blade simulta neously in a horizontal and vertical plane whereby the fabric may be. cut into predetermined lengths without buckling thereof,

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said blade and said tab wing nfependcntly mouned on said bass.

7. In a. device of the character describefL theombinaton with n base, n. movabe table thereon over which fbrv adapted to travel, a, blade supporting bar pvomlly mounted on said base :md a blade adapted to move synchronousy wim the @ma 0f a. power shaft adapted through intcrmeda means tu impart ripmcatng Cfvemenr; to said bar', and a, Cam 3u-operating with @aid bm? ti) gx'e it a vertical n vmmra at he same time 'Whawy the fu'rn may be cui into redemined 1' gggchz'f 'without- :my buckling thereof,

1n a. devce of @h- Chamcer' f rilwd, the. combination with n @In a. mnf'zmetabs, thereon over which. fafnia is; .fiapted. to travelj a blade supputlng mw mmm'isd un said base, n blinde Lw one @mi ui wld bar adapted to mow syncmemmsg; van the mma im@ means to m'pm ww; wmmxgf im tion to said mug nf means nbermedafe the ends 0f mbar in nxpnr, a vert-l mm@1` ment; thereto at the time, whereby the fabric may be cut inw medermned lengths wiihout buckling ther/0i 9. In a device of the character described, the combination v-fth a basan movable table thesren, @var which the fabric is adapted to travel, sa, curved blad@ sup rtnfg bar adapted. t ma syxwhrrmcmsf wth the mbv and mamma tu impart a. remi wanting move--I ment to the wher end of san, bam, of an arm projecting from h@ reisentfm part of the. bar',

0am thereunder wub which said` arm c0- opflmes 0 gw av vefrfica movement t@ the euppfmng bal' smumwously with the m uigirmm-lng movement whereby the fbrc. may be mit, inl- @mrmned lengths withmxt buftmng Hawai In esnnny whereof A affix my signature.

LEWIS K, DAVIS. 

